The best way to study the operation of these structures is to treat them as engineered systems that are designed with some kind of a purpose.
The objection, stated in various forms by thinkers dating back to David Hume, goes something like this.
Digital cameras, and cell phone cameras, of course, are the result of millions of years of blind and unguided evolutionary processes, not intelligent design.
Repeat after me: “Biologists must constantly keep in mind that what they see was not designed, but rather evolved.”
By mimicking the locomotion of various kinds of living organisms, engineers are building impressively mobile robots.